Paper-box construction



H. B. SMITH.

PAPER BOX CONSTRUCTION."

APPLICATION FILED FEB. 24, 1920.

1,364,897.- Patented Jan5 11,1921.

5M ucM-to c L ffjrz'a yznau i @311 @ttozmeqs v5: g gn/ A HARRY BRIDGMAN SMITH, 0F BROOKLYN, NEW YORK.

PAPER-BOX CONSTRUCTION.

Specification of Letters Patent.

Patented Jan. 11, 1921.

I Application filed February 24, 1920. Serial No. 360,561.

To all whom it may concern.

Be it known that I, HARRY BRIDGMAN SMITH, a citizen of the United States, and resident of city of Brooklyn in the county of Kings and State of New York, have invented certain new and useful Improvements in Paper-Box Construction, of which the following is a specification.

This invention relates to paper box construction, pertaining more particularly to covered box shells in which opposite end walls of the box are formed of more than a single .thickness of the box, blank, providing a multi-ply end formation, and the present application is a continuation in art of my application, Serial No. 235,515, led Ma 20, 1918.

vl hile boxes of this general type-formed from blanks foldable to provide end walls having more than one thickness-have heretofore been used commercially, and box shells of this type have been covered by a covering blank in several Ways, I have discovered an entirely new Way of applying covering blanks to boxes having mu'lti-ply end Walls, that not only adds greatlv to the appearance and strength of the finished box, but materially reduces the cost of manufacture thereof.

One a distinguishing characteristic of my improved covered box having multi-ply end walls, lies in the fact that portions of the covering blank are infolded about the vertical edges of the outer wing of the multi-ply wall at each end of the box, said infolded portions being confined between adjacent end wall plys, thus not only making a stronger box, but adding greatly tothe attractive appearance thereof because the opposite vertical edges of the said outer wings are neatly covered. So far as I am aware,

I am the first to apply a covering blank in this way.

In producing boxes of the character described, I have not only found that the cost of manufacture may be very materially decreased over the cost of manufacture of the boxes of the prior art, but I am able to produce a much more attractive and stronger box in a more efiicient manner, this being due in part to the fact that the arrangement is such as to obviate the necessity of accurately registering the body blank and covering blank in the assembly of these parts, and furthermore, no, preliminary staying or wing-affixing operations are required. I have also found certain other advantages in the method of manufacture which tendto reduce the cost of production and add to the strength and appearance of the product, but these are not particularly referred to or claimed herein, as claims to the method of more fully described, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims.

In the accompanying drawings, in which similar reference characters indicate similar parts in each of the views:

Figural, is a perspective view illustrating one form of box blank and complemental covering blank which may be utilized in the production of the box.

-Figs. 2, 3 and 4, are perspective views illustrating steps in the manufacture of the box.

Fig. 4 is a perspective view of a slightly different form of the invention.

. Fig. 5, is a perspective view of a completed box of the tight wrapped type.

Fig. 6, is a perspective View, on an enlar 'ed scale, showing a portion of the box of *ig. 5 with parts broken away to show positions of the blanks in the completed box.

Fig. 7, is a perspective view showing a different form of box blank, 2'. e., for a box of the loose wrap type.

' Fig. 8, is a perspective view showing a completed box of the loose wrapped type, a portion being broken away to illustrate the relation of the parts.

Referring first to Figs. 1 to 6 inclusive,

A indicates the, box blank and B the covto cause laps a to form a ply of the end wall formation, end wing a forming the outer in the present showing, such as to increase the area of this portion of the covering blank, it being understood that the configuration of the covering blank is generally of a different configuration from that of the box blank with the body portions of the two blanks differing in area. As shown,

blank B is provided with adhesive, indicated. at c. The cover blank B, may be adhesively attached throughout its entire area to exterior walls of box blank 'A,'as is common in what are known as tight wrap boxes, or it may be-attached at its infolded marginal edges only to produce what are knownas loose wrap boxes. The invention is applicable to both types of boxes. The differences in the blanks will be readily understood from Fig. 2. p

Fig. 2 shows a sta e in the manufacture,

. the two blanks accor ing to my new method tilt ' end wings b are of a length being assembled while both are flat to place the body portion a of the box blank in superposed relation to the body portion 6 of the covering blank, this figure showing marginal portions of side win s b as having been folded about and aiiixe to similar portions of: side wings a of the box blank, this being one method of manufacture of the box. As will be seen, the length of the side wings b is less than the combined length of the side wings and laps of the box blank, while the greater than the h of the end wings at. And as will be ced in the form illustrated in Fig. 1, the b ems oi the corner notches of blank B are s aced from the corners of body portion a, that in the osition shown in Fig, 2, the notches of the ox blank practically overlie unbroken or uncut portion of the cover kg this arrangement, however, is not lately necessary in so far as the final precinct is concerned.

This effect will be more particularly understood from Fig. 3, which shows the assembled side wings as raised, the excess portion oi the end wings b "being folded upward and in this position, extending in the plane of the side wings W, the notches of the hon blank extending within this por tion oi: the end Wings 5'. It will be noted from Fig. 3, that a portion of each corner lap of is covered by side and end wing portions of, the covering blank, while other then turne portions of'these laps a are exposed; This particular confi ration difiers radically from the genera type of box confi ration during the covering operations, an the peculiar conditions resent are "met in the manner shown in igs. 4 and 4' either by forming gusset-folds a, Fig. 4,in the cover blank at the box corners, or by cutting or tearing the covering blank during the covering operation so as to reduce the body portion b to a proper size relative to body portion a, this being provided in suitable manner as by turning corner laps a inward as indicated in Fig. 4* which has the effect of tearing the blank to the proper point. The portion of the side wings b which overlap corner laps a aid in this connection, whether torn or in the form of gusset-folds, in that inturning of these laps a may serve to produce the gusset-folds or the tearing action, it bein understood, of course, that this portion 0 side wings a is adhesively connected to the inner face and overlies the top ed of the upstanding side wings and corner a s.

After t e' cutting or tearing action, or the gusset-fold formation, has taken place, or simultaneously with such action or formation the portions of the end wings b which provide the excess length of these wingsshown as u standin in Figs. 4 and 4are inwar and referably afiixed to the u per face of end wings a'-thus causing t ese portions of the end 'wings I) to be folded about opposite edges of end wings a and neatly cover the same. The folded formation of wings a thus pro duced is then raised to complete the composite or multi-ply end formation, thus placin these excess length portions of both the si e and and wings of the covering blank between the end wings and corner laps of the box blank, after which the up: standing marginal portion of end wings I) is infolded to overlie the marginal portions of both plies of the end formation, producing the configuration shown in Fig. 5. The

location of the excess length portions of the covering blank is indicated in Fig. 6, the latter view illustrating clearly the fact that all edges of the box blank are covered, thus ex osing no raw edges.

, The box blank of Fig. 7 varies from that of -Fig. 1 in the shape of the end wings a,

and corner laps a the'covering blank being changes in Si ape to take care of this condition. The general operation for producing the box is approximately the same as with the other form, the completed box, however, having a different external appearance, resembling what is known. as a loose wrap, as shown more particularly in Fig. 8, the outer ply conforming to the particular shape of end wings a, the arrangement being such that the raw edges of the outer ply are covered. In boxes of the loose wrap ty e the covering blank is attached only at its infolded marginal edges 6', and b As will be seen, however, both types employ a box blank and covering blank in which the body portion of the cow adapted to produce the covering portions for the raw edges at the ends of the end wings. In addition, the covering blank has its end and side wings of such size as to project beyond the corresponding wings of the box blank, thus producing marginal portionswhich are adapted to be turned over the marginal edges of wings and be adhesively secured to the-face of the box blank. As shown in Figs. 2 and 7, this inturning of the marginal edges of the side wings may be provided while the blanks-are in the flat, thus producing an embryo assembly.

It is to be understood that the covering blank may be attached by zones of adhesive of the stencil type-at predetermined points only-thus producing what are known as boxes of the loose wrap type, and it will be understood that the blank may beadhesively attached substantially throughout its area, thus producing boxes of the tightwrap type.

Inasmuch as the bottom of the notches of the covering blank and those of the box blank differ from each other in position and are brought into registration during folding by the tearing or cutting, or the gussetfold forming operations referred to, it will be understood that there is no necessity for accurate registration of the blank during assembly, thus eliminating one'troublesome factor in the cost of manufacture.

In addition, this has the further advantage of smoothing out the covering material which extends between the plies of the end configuration, the more or less irregular appearance produced by the tearing or gusset folding operation being immaterial since this portion of the covering blank is en-- tirely hidden by the'completion of the end formation of the box.

It will be understood, therefore, that the box -construction of the present invention has several characteristics. For instance, the end formation is provided by a plural ity of plies or thicknesses of the box blank; the marginal portions of the end wings of the covering blank overlie all of the plies of the end formation. being inturnedonto the inner face of the formation; portions of the cover blank extend between plies of the end formation and thus overlie and cover the raw edges of the outer play. While exterior walls of the box and it is preferred that all raw -marginal edges of the box blank be covered, it will be readily understood that the invention is not limited in this respect, since the invention contemplates a construction in which the marginal edges of the upstanding side wings are left uncovered, an arrangement whlch retains the essential factors of the present invention, in that the end formation is not only so'arranged as to provide for the covering of raw edges, but retains the advantage of the increase in strength of this formation provided by the construction shown, and adding greatly to the attractiveness of the box.

As heretofore pointed out, the present invention pertains to the box construction, it i being readily understood that while I have w shown a method by which it can be produced, the invention is not limited to such method or methods, the method of manufacture being claimed in my aforesaid companion a plication.

While have herein shown and described several ways in which the present invention may be carried into effect, it will be readily understood that changes and modifications t therein may be found necessary or desirable in meeting the exigencies of use, and I desire to be understood as reserving the right to make any and all such changes or modifications therein as may be found desirable or essential, in so far as the same may fall within the spirit and scope of the invention as expressed in the accompanying claims, when broadly construed.

What I claim is:

1. A covered box shell comprising a box blank having end wings and side wings with corner laps, said end wings and corner laps being folded to produce an end wall formation embodying more than a single and extending between adjacent plies of I such end formation. a

2. A covered box shell comprising a box blank having end wingsand side wings with corner-laps, said end wings and corner-laps being folded to produce multiply'end walls with the corner laps arranged interiorly of the shell, and a covering blank overlying the havmg portions thereof infolded about the opposite raw edges of the end wings and extending between adjacent plies of the multiply end walls.

3. A covered box shell comprising a box blank and a covering blank assembled to produce an end formation embodying more than a single ply of box blank material, with portions of the covering blank inturned over the marginal edges of each of the upstandin box walls and having other portions to ded about opposite raw edges of the outer ply of the end formations and lying between adjacent plies. y

i. A. covered box shell, including a shell blank having win s and corner laps,,and an exteriorly ap lie covering blank for the shell, said she 1 blank having predetermined wings and laps constituting a. multiply structure for end walls of the box, the said covering blank having portions folded over and covering the marginal edges of the formed box shell including the corner laps, with other portions inliolded about and covering the opposite edges oi the wings in eluded in each end well structure of the box, said infolded portions lying between adjacent wings and corner laps.

5. A covered box comprising a shell blank and 2. covering blank applied enteriorly thereof, said shell blank having a body portion end integral side end end wings, two of said wings heving corner laps, all of the wings being folded at an engle to the body portion to form the side and end walls of the box shell with the said corner laps infolded n sheet the inner laces oi the end wells of te shell, and the seid covering blank heaving portions infolded about the opposite edges of the end wings at the ends oi the box end extending between the inner face of said end the enter feces of the adjacent said blanks being assembled and fo ded into a shell having a multi-ply end formation and with portions of the covering blank at each corner of the box infolded in the form of a gusset, and lying between adjacent plies.

7. An embryo assembly for covered box shells comprising a box blank having a. body portion, end wings, and side wings having corner laps, and a covering blank having a body portion, end and side wings, said covering blank having its body portion of greater length in one dimension than the corresponding portion of the box blank, with the increase overlying portions of the opposite box blank end wings, the several wings of the covering blank projectin beyond the corresponding wings of the box blank to provide marginal portions, opposite side margins extending onto and .secured to the inner sides of the side wings of the box blsnk.

Signed at city of Brooklyn, in the count of r in s and State of New York this 191: 1 day of )ebruery, 1920.

HARRY BRIDGMAN SMITH. 

